package com.sky.service.impl;

import com.fasterxml.jackson.databind.util.BeanUtil;
import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    ShoppingCartMapper shoppingCartMapper;
    @Autowired
    DishMapper dishMapper;
    @Autowired
    SetmealMapper setmealMapper;
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        Long userId = BaseContext.getCurrentId();

        shoppingCart.setUserId(userId);
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list != null && list.size()>0 )
        {
            shoppingCart = list.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()+1);
            shoppingCartMapper.update(shoppingCart);
        }
        else {
            Long dishId = shoppingCart.getDishId();
            if (dishId!= null ) {
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }
            else
            {
                Long setmealId = shoppingCart.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setNumber(1);
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(BaseContext.getCurrentId())
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void cleanShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }

    @Override
    public void deleteShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list!= null && list.size()>0 )
        {
            shoppingCart = list.get(0);
            Integer number = shoppingCart.getNumber();
            if(number==1) {
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }
            else{
                shoppingCart.setNumber(number-1);
                shoppingCartMapper.update(shoppingCart);
            }
        }
    }
}
